Trolley mechanism.



D. T. FISHER.

TROLLEY MECHANISM.

APPLICATION FILED APR. 16, 1910.

Patented Nov. 26, 1912.

2 SHEETS-SHEET 1.

wi/bmeowa W 6 D. T. FISHER.

TROLLBY MECHANISM. APPLICATION FILED L16, 1910.

1,045,538., Patented Nov. 26, 1912.

2 SHEBTSSHEET Z.

witnesses COLUMBIA PLANOGRAPH C0,,WASHINGTON. D. c.

UNITED STATES PATENT QFFIQE.

DUDLEY T. FISHER, 0F COLUMBUS, OHIO, ASSIGNOR TO THE JEFFREY MANUFACTUR- ING COMPANY, A CORPORATION OF OHIO.

TROLLEY MECHANISM.

Specification of Letters Patent.

Patented Nov. 26, 1912.

To all whom it may concern:

Be it known that I, DUDLEY T. FIsHER, a citizen of the United States, residing at C0- lumbus, in the county of Franklin and State of Ohio, have invented certain new and useful Improvements in Trolley Mechanism, of which the following is a specification, reference being had therein to the accompanying drawing.

The present invention relates more particularly to mountings for trolley poles, and especially those that are employed in confined places, such as mines, and the like, although of course not necessarily limited to such use.

The primary object of the invention is to provide a structure that is exceedingly simple and compact in its character, and occupies but very little space vertically.

An embodiment of the invention that is at present considered the preferable one is disclosed in the accompanying drawings, but it will be evident from an inspection of the appended claims that the invention is not necessarily limited to the structure set forth.

In said drawings, Figure 1 is a side view of a locomotive having a trolley mechanism embodying my invention. Fig. 2 is a cross sectional elevation of the trolley mechanism with the pole in its lower or inoperative position. Fig. 3 is a cross sectional elevation of the trolley mechanism with the pole in its upper or operative position. Fig. 1 is a front elevation with the pole in its lower position. Fig. 5 is a plan view with the pole in its lower position.

Similar reference numerals designate corresponding parts in all the figures of the drawings.

In the embodiment disclosed, a base 5 is employed, having a socket 6 therein, which socket is covered by a detachable cap 7 Se cured in place by screws 8, or other suitable fasteners, and having a central opening 9 therethrough.

A plunger 10 extends through the opening 9, and has a reduced portion 11 located in the socket, and forming an annular bearing shoulder 12. A coiled spring 13, surrounding the reduced portion 11 and, having its lower end centered by a stem 14 that projects upwardly into the socket from the base, has its other end bearing against the shoulder 12. Said spring thus exerts an upward pressure against the plunger 10.

A sleeve 15, surrounding the plunger, extends through the opening 9 into the socket and terminates at its lower end in an outstanding fiange 16. Another coiled spring 17 surrounds the portion ofthe sleeve within the socket 6, said spring bearing against the cap or cover 7 and against the upper side of the flange 16. A yielding downward pressure is thus brought upon the sleeve.

A trolley-carrying member is employed, comprising a. socket-piece 18 having a pair of ears 19 at one end that embrace the upper end of the plunger 10, said plunger being pivoted directly to the ears by a pin 20. A pair of links 21 are pivotally connected to the ends of the ears 19 by a pin 22, and these links are also pivoted tothe sleeve 15 by a pin 23 that passes through an enlargement 24 formed upon one side of the upper end of the sleeve. The socket 18 is designed to receive the end of a trolley pole, as 25, that is clamped therein by compressing the walls of the socket, said walls being split, as shown at 26 and connected by compressing bolts 27, or other suitable elements. With this arrangement, it will be noted that both the members to which the trolley pole is connected, are movable, and that these movements must take place simultaneously in opposite directions. When therefore the trolley pole is'in its elevated position, the sleeve is in its lowermost position against the bottom of the socket 6, while the plunger 10 is in elevated position. When, however, the

trolley pole is depressed, as illustrated in Fig. 2, both springs are compressed, resulting in a downward movement of the plunger and an upward movement of the sleeve. As a result of the use of two separate parallel springs I am enabled to provide a trolley mounting in which the length of the spring space is only about one-half the length of the spring space in the trolley mountings ordinarily used.

From the foregoing, it is thought that the construction, operation and many advantages of the herein described invention will be apparent to those skilled in the art, without further description, and it will be understood that various changes in the size, shape, proportion and minor details of construction, may be resorted to without departing from the spirit or sacrificing any of the advantages of the invention.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In trolley mechanism of the character set forth, the combination with a base, of a trolley-carryin g member, means for mounting the trolley-carrying member on the base, said means including a swinging link pivoted to the trolley-carrying member, a plunger slidably mounted in the base and pivoted directly to the trolley-carrying member intermediate the link and the trolley, and a compression spring bearing upward against the plunger.

2. In a trolley mechanism of the character set forth, the combination with a base, of a supporting device upstanding from the base, a carrying member pivotally mounted between its ends on the supporting device, a sleeve slidable on the supporting device, means at one end of the carrying member for the attachment of a trolley pole, va connection between the other end of the carrying member and the sleeve, and a spring surrounding the sleeve and exerting thereon a yielding downward pressure to elevate the pole end of the carrying member.

3. In a trolley mechanism of the character set forth, the combination with a base having a socket, of a device projecting above the base, a trolley-carrying member pivotally mounted on the device, a sleeve slidable on the device and extending into the socket of the base, link connections between the sleeve and the trolley-carrying member, said sleeve having an outstanding flange, and a spring surrounding the sleeve and bearing downwardly upon the flange.

4. In a trolley mechanism of the character set forth, the combination of a trolleyof both devices in predetermined directions.

5. In a't-rolley mechanism of the character set forth, the combination of a trolleycarrying member movable in a vertical plane, two oppositely and parallelly movable devices adjacent each other in the said vertical plane at one side of the trolleycarrying member, pivotal connections between each of the devices and the trolley carrying member, and means for exerting yielding resistance to the movement of one of the devices in one direction and to the movement of the other device in the other direction.

said devices and the trolley-carrying member, each connection comprising a pivot joint, a spring exerting a downward pressure upon one device, and a spring exerting an upward pressure upon the other device.

7. In trolley mechanism of the character set forth, the combination with a base, of a plunger movable therein, a sleeve slidable on the plunger, a spring exerting a pressure in one direction on the plunger, a spring exerting a pressure in an opposite direction on the sleeve, and a trolley-carrying member having pivotal connections with the plunger and sleeve.

8. In trolley mechanism of the character set forth, the combination with a base having a socket, of an upwardly movable stud mounted on. the base, a spring bearing against the stud for urging the same upwardly, a sleeve surrounding the stud and slidably mounted in the socket, a spring surrounding the sleeve and bearing against the same to exert a downward pressure thereon, a trolley-carrying member pivoted on the stud, and a link connection between the sleeve and said trolley-carrying member.

9. In a trolley support, the combination of a trolley carrying member, two longitudinally movable concentric elements, supporting connections between the said elements and spaced portions of the said trolley carrying member, and springs tending to move the said elements in opposite directions and thereby hold the trolley in operative position.

10. In a trolley supporting mechanism, the combination of two concentric coil springs, a trolley arm, a connection between one end of one spring and the trolley arm for transmitting the force of the said spring to tend to move the arm into operative posisupport relative to the first to lift the arm into operative position.

12. In a trolley supporting mechanism, the combination of a trolley arm, a base casing having an opening in the top thereof, two elements slidable within the said opening, springs within the casing tending to lift one element and depress the other, and connections between each element and the trol- 6. In a trolley mechanism of the char- I ley arm whereby the movement of either eleacter set forth, the combination with oppoment tends to lift the trolley arm into operative position.

13. In a trolley supporting mechanism,

the combination of a trolley arm, a base casing having an opening in the top thereof, two concentric elements in the said opening slidable relative thereto and to each other, two concentric springs within the casing, the inner one engaging the inner element to move it upward and the outer one engaging the outer element to move it downward, and pivotal connections between the said ele ments and the trolley arm, whereby the movement of the elements under the influence of the springs moves the arm into operative position.

14. In a mechanism of the class described,

the combination of a railway car having a socket in the top of the frame thereof, a base adapted to be inserted into or removed from the socket, two concentric coil springs within the base, a trolley arm, and connections between the springs and the trolley arm whereby each spring tends to move the arm into operative position.

In testimony whereof I affix my signature, in presence of two witnesses.

DUDLEY T. FISHER. Witnesses:

E. R. MERRILL, E. P. SNIVELY.

Copies of this patent may be obtained for five cents each, 'by addressing the Commissioner of Patents,

Washington, I). G. 

